4.7 Article

Effect of modified microbial flocculant on membrane fouling alleviation in a hybrid aerobic granular sludge membrane system for wastewater reuse

期刊

出版社

ELSEVIER
DOI: 10.1016/j.seppur.2022.120819

关键词

Modified microbial flocculant; Pre-coagulation; Aerobic granular sludge membrane system; Membrane fouling; Correlation analysis

资金

  1. National Natural Science Founda-tion of China [52000014, 52000017]
  2. Natural Science Foundation of Chongqing Science AMP
  3. Technology Commission [cstc2020jcyj-msxmX0824]
  4. Science and Technology Research Program of Chongqing Municipal Education Commission [KJQN202000825]
  5. Innovation Group of New Technologies for Industrial Pollution Control of Chongqing Education Commission [CXQT19023]
  6. Project of Chemical Engineering and Technology Team [ZDPTTD201915]

向作者/读者索取更多资源

This study reveals that modified microbial flocculants (MMFs) are effective in mitigating membrane fouling, with an optimal dosage of 10 mg/L. The occurrence of membrane fouling is found to be mainly related to total phosphorus, chemical oxygen demand, and polysaccharides in the raw wastewater.
Pre-coagulation is an excellent method for alleviating membrane fouling in aerobic granular sludge (AGS) membrane systems (AGSMSs) for wastewater reuse. However, little attention has been paid to modified microbial flocculants (MMFs) for membrane fouling mitigation. Herein, an MMF was prepared, and the effect of its dosage (5-30 mg/L) on membrane fouling mitigation was investigated. MMF pre-coagulation could effectively alleviate membrane fouling by utilizing electrical neutralization and adsorption bridging. When the MMF dosage was 10 mg/L, the membrane flux was increased by 79.4% and the total fouling resistance was reduced by 90.3%. The MMF dosage of 10 mg/L greatly inhibited the adhesion and accumulation of foulants, thereby forming a loose and porous cake layer on the membrane surface. Moreover, the extended Derjaguin-Landau-Verwey-Overbeek theory further clarified that the greatest energy barriers existed throughout the filtration process with an MMF dosage of 10 mg/L. Correlation analysis showed that the occurrence of membrane fouling was mainly related to total phosphorus, chemical oxygen demand, and polysaccharides in the raw wastewater. This study reveals the effects of different MMF dosages on membrane fouling and provides a novel approach for MMF pre-coagulation to mitigate membrane fouling.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.7
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据